Reclaiming apparatus and method, and CO2 recovery apparatus and method

Abstract

A reclaiming apparatus includes: a container in which a reclaiming process of an absorption liquid is performed; an absorption liquid supply line for supplying the container with the absorption liquid; a heat exchange device, installed inside the container, for heating a liquid inside the container; a circulation line for extracting the liquid inside the container, circulating the liquid and returning the liquid to the container; and a circulation pump installed in the circulation line.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a reclaiming apparatus, a reclaiming method, a CO2 recovery apparatus, and a CO2 recovery method.BACKGROUND ART[0002]As a method of recovering CO2 contained in exhaust gas from a power generation facility or the like, a chemical absorption method is often used.[0003]In a chemical absorption method, exhaust gas containing CO2 and an absorption liquid containing an absorption agent make contact, and the absorption liquid absorbs CO2 in the exhaust gas. Accordingly, CO2 is removed from exhaust gas. The absorption liquid having absorbed CO2 releases the absorbed CO2 to be regenerated, by being heated by steam or the like, and is re-utilized as an absorption liquid. As the absorption liquid is re-utilized repeatedly, impurity substances from exhaust gas and depleted materials from the absorption liquid accumulate in the absorption liquid. Reclaiming is performed to remove such depleted materials or the like accumulating in the absorp...

AI Technical Summary

Benefits of technology

[0009]In view of the above, an object of at least one embodiment of the present invention is to provide a reclaiming apparatus and a reclaiming method, and a CO2 recovery apparatus and a CO2 recovery method capable of suppressing bumping in reclaiming.

[0044]According to at least one embodiment of the present invention, provided is a reclaiming apparatus and a reclaiming method, and a CO2 recovery apparatus and a CO2 recovery method capable of suppressing bumping in reclaiming.

Problems solved by technology

Thus, during the process of condensation, the moisture concentration in the liquid becomes relatively low, and the viscosity of the fluid increases, which makes it difficult for natural convection to occur.

When convection reduces, distribution of the concentration and the temperature in the liquid inside the container is more likely to become uneven, generating a high-temperature section and a non-volatile-material concentrated section partially in the liquid, which may cause bumping.

Furthermore, in a case where the above described kettle-type heat exchanger is used, boiling occurs outside the heat exchange device (heat-transfer tube or the like), whereby the heat exchange device physically prevents convection, and thereby bumping is even more likely to occur.

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